Actually, the last time libMesaGLU.so should have been existing was with mesa 3.1, so, way, way, way back in time (I found a rename in some git history from 1999). So something's very wrong here. The question is, why does lib/kcm_opengl.so or the build system expect something old like that, on your system._________________backend.cpp:92:2: warning: #warning TODO - this error message is about as useful as a cooling unit in the arctic